Not the end of the world, just reported as found:
As the only mediaplayer app on any of our Android phones (various), Roon produces staggering audio when other apps takes UI focus. Could it be that non-UI related Roon processes related to stream playback is running on the UI-thread? If so, that use of the UI thread is a no-no in the context of Android. Everything is fine when Roon has UI focus.
For reference, consider this is a problem even on the LG V10, launched Oct 2015.
AUDIO QUALITY INDICATOR TOO CONSERVATIVE
There is the “diamond” for supreme audio quality, then green for good, etc. On LG V10 with built in audiophile grade DAC 9018 (the big brother of the 9016 in e.g. the Dragonfly red, or the Pioneer u-5), accompanied by equally excellent headphone amplifier 9602, both from ESS SABRE, the green light is always shown. It should be diamond.
Is this qualitative evaluation related to playback on a type of outlet like the mobile smartphone headphone out, i.e. such a device is always granted “green only”?
If so, know that there is a flooding of hi-fi equipped smartphones ramping up a new type of market for mobile phones; “audiophile playback with a smartphone”.
In particular, the LG V10 will automatically adjust to low or high impedance headphones, discover and adjust again when connected to AUX input on a preamplifier, etc.
LG V10 Audio quality via its analog out is fabulous: Diamond is the correct verdict.
DIFFICULT TO PLAY DSD
DSD playback is problematic, but more testing needed.